Blue toruses = 15 protons
Red toruses = 7 nuclear electrons
Atomic number of O (8) = protons (15) - nuclear electrons (7)
Oxygen 15 transformed by positron emission from a source of a photon by decomposition, while
electron component of the photon captured (at the center) of Oxygen 15 transition form, generating Nitrogen 15 nucleus (stable).
Click on image for Nitrogen 15 nucleus.
Light photon modell
Oxygen 15 isotope nuclear composition, O15 nuclear structure and positron emission. The positron emerged from a gamma photon by pair production. O15 is formed from F16.